Android NDK build to support all available devices

I am using in my project both java files and native c++ code. I would like to make the app available for all devices and hardware (API lvl >= 15). I am also using OpenCV4Android both in java and my native c++ if that matters. I'm not quite sure if my current configuration is sufficient to support all available hardware:

To support all platforms you should use APP_ABI := all
. For API 15 use APP_PLATFORM := android-15.
Pay attention that the more platforms you will support the larger your apk file will be, since it will create a binary for each supported platform in your APK.